Are you facing the following error when you try to boot up a Virtuozzo VPS ?

mv: cannot move `/etc/resolv.conf.xxxx' to /etc/resolv.conf': Operation not permitted
ERROR: Can't change file /etc/resolv.conf
File resolv.conf was modified

This might be if you have set an immutable flag on the file

This file is automatically generated at boot based on the VPS conf.
So, remove/rename the file /etc/resolv.conf ( for the respective VPS )
from the Virtuozzo node and reboot the VPS in question.